ABAP Select data from SAP table KV020 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KV020 table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to KV020. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the KV020 table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_KV020 TYPE STANDARD TABLE OF KV020,
      WA_KV020 TYPE KV020,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <KV020> TYPE KV020.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KV020.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KV020
  INTO TABLE IT_KV020.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KV020
*  INTO TABLE @DATA(IT_KV0202).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_KV020 INDEX 1 INTO DATA(WA_KV0202).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KV020 ASSIGNING <KV020>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KV020>-KSTAR = 1.
<KV020>-HRKFT = 1.
<KV020>-PAROB = 1.
<KV020>-MATNR = 1.
<KV020>-WERKS = 1.

ENDLOOP.

LOOP AT IT_KV020 INTO WA_KV020.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KV020-AWBEL, sy-vline,
  WA_KV020-VKGBTR, sy-vline,
  WA_KV020-VKFBTR, sy-vline,
  WA_KV020-VKLBTR, sy-vline,
  WA_KV020-VKDBTR, sy-vline,
  WA_KV020-VKPBTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KV020 you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_KV020 TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_KV020 INTO WA_KV020.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV020-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KV020-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field VKGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-VKGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-VKGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field VKFBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-VKFBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-VKFBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field VKLBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-VKLBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-VKLBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field VKDBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-VKDBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-VKDBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field VKPBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-VKPBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-VKPBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field VOGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-VOGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-VOGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field VOLBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-VOLBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-VOLBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field VOPBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-VOPBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-VOPBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field BKGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-BKGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-BKGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field BKFBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-BKFBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-BKFBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field BOGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-BOGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-BOGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field PKGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-PKGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-PKGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field PKFBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-PKFBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-PKFBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field RKGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-RKGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-RKGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field RKFBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-RKFBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-RKFBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field ROGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-ROGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-ROGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AWMEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KV020-AWMEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-AWMEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KATYP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV020-KATYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-KATYP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field UKGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-UKGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-UKGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field UKFBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-UKFBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-UKFBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field UOGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KV020-UOGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV020-UOGBTR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_KV020_STR, 
KSTAR TYPE STRING,
HRKFT TYPE STRING,
PAROB TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
AWBEL TYPE STRING,
VKGBTR TYPE STRING,
VKFBTR TYPE STRING,
VKLBTR TYPE STRING,
VKDBTR TYPE STRING,
VKPBTR TYPE STRING,
VOGBTR TYPE STRING,
VOLBTR TYPE STRING,
VOPBTR TYPE STRING,
BKGBTR TYPE STRING,
BKFBTR TYPE STRING,
BOGBTR TYPE STRING,
PKGBTR TYPE STRING,
PKFBTR TYPE STRING,
RKGBTR TYPE STRING,
RKFBTR TYPE STRING,
ROGBTR TYPE STRING,
VMGBTR TYPE STRING,
VMFBTR TYPE STRING,
AWVMU TYPE STRING,
BMGBTR TYPE STRING,
BMFBTR TYPE STRING,
AWBMU TYPE STRING,
AWMEH TYPE STRING,
KATYP TYPE STRING,
AWLOS TYPE STRING,
UKGBTR TYPE STRING,
UKFBTR TYPE STRING,
UOGBTR TYPE STRING,
UMGBTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KV020_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_KV020_STR-KSTAR sy-vline 
WA_KV020_STR-HRKFT sy-vline 
WA_KV020_STR-PAROB sy-vline 
WA_KV020_STR-MATNR sy-vline 
WA_KV020_STR-WERKS sy-vline 
WA_KV020_STR-AWBEL sy-vline 
WA_KV020_STR-VKGBTR sy-vline 
WA_KV020_STR-VKFBTR sy-vline 
WA_KV020_STR-VKLBTR sy-vline 
WA_KV020_STR-VKDBTR sy-vline 
WA_KV020_STR-VKPBTR sy-vline 
WA_KV020_STR-VOGBTR sy-vline 
WA_KV020_STR-VOLBTR sy-vline 
WA_KV020_STR-VOPBTR sy-vline 
WA_KV020_STR-BKGBTR sy-vline 
WA_KV020_STR-BKFBTR sy-vline 
WA_KV020_STR-BOGBTR sy-vline 
WA_KV020_STR-PKGBTR sy-vline 
WA_KV020_STR-PKFBTR sy-vline 
WA_KV020_STR-RKGBTR sy-vline 
WA_KV020_STR-RKFBTR sy-vline 
WA_KV020_STR-ROGBTR sy-vline 
WA_KV020_STR-VMGBTR sy-vline 
WA_KV020_STR-VMFBTR sy-vline 
WA_KV020_STR-AWVMU sy-vline 
WA_KV020_STR-BMGBTR sy-vline 
WA_KV020_STR-BMFBTR sy-vline 
WA_KV020_STR-AWBMU sy-vline 
WA_KV020_STR-AWMEH sy-vline 
WA_KV020_STR-KATYP sy-vline 
WA_KV020_STR-AWLOS sy-vline 
WA_KV020_STR-UKGBTR sy-vline 
WA_KV020_STR-UKFBTR sy-vline 
WA_KV020_STR-UOGBTR sy-vline 
WA_KV020_STR-UMGBTR sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.